[Security] Added Danish translation
merged branch toin0u/SecurityTranslation (PR #6761)

This PR was merged into the master branch.

Commits
-------

68ac23f [Security] Added Danish translation

Discussion
----------

[Security] Added Danish translation

Bug fix: no
Feature addition: no
Backwards compatibility break: no
Deprecations: no
Symfony2 tests pass: yes
Fixes the following tickets: -
Todo: -
License of the code: MIT
Documentation PR: -